Abstract

We propose a flat lensing effect using a periodic loss-modulated material. In particular, we consider a two-dimensional square and rhombic arrangement of lossy cylinders embedded in a host media with the same refractive index. The effect is predicted by the dispersion curves obtained by a coupled mode expansion of Maxwell equations and by numerical beam propagation experiments. From both analytical and numerical studies, we show that, for a range of frequencies, light beams undergo negative diffraction on propagation through the loss-modulated medium, providing a window of high transmission. The phase shifts accumulated by negative diffraction within the structure are then compensated by normal diffraction, leading to substantial focalization beyond it.

© 2013 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Beam shaping in two-dimensional metallic photonic crystals

N. Kumar, L. Maigyte, M. Botey, R. Herrero, and K. Staliunas
J. Opt. Soc. Am. B 31(4) 686-690 (2014)

Formation of X-pulses in periodically gain/loss modulated materials

Yurii Loiko, Muriel Botey, Ramon Herrero, and Kestutis Staliunas
Opt. Express 20(10) 11271-11276 (2012)

Unlocked evanescent waves in periodic structures

Muriel Botey, Yu-Chieh Cheng, Vicent Romero-Garcia, Ruben Picó, Ramon Herrero, Victor Sánchez-Morcillo, and Kestutis Staliunas
Opt. Lett. 38(11) 1890-1892 (2013)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (6)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Equations (5)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Metrics

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription